ship porthole Anyone Can you identify??

can anyone identify??

 

any numbers or marks on it ?

 

Unless you have the provenance on it, it’ll always be a nice ship’s porthole and that’s about it. I think you’d have to find a naval architect to tell you when in 20th C. it was made and in general what kinds of ships it might have been used in (cargo/passenger/naval whatever.). All I know for sure is that it was used in steel-hulled, engine-powered ships.

 

Is it brass? It’s so heavy

 

sure it's brass.........no rust !

 

Yeah, my teachers always said “Don’t be so technical.” But I couldn’t help it.

It could be bronze, but I have no idea just by looking. When you corner that naval architect, ask him/her.

 

Bronze is to soft for a Port Hole. It looks like Red Brass.

 

In my opinion it is bronze. I have removed similar portholes from small ships being scrapped and they were always bronze.
You could get away with brass for inland waterway craft but salt water is not good with brass and this port was intended for a ship at sea. Inland waterways do not need such robust clamps. That port could be well pounded before breaking open.

 

ok..so it's either bronze or brass.......

 

Bronze is softer than Brass and the metal would look redder. Therefore it would disintegrate faster. That Porthole is Brass. You have White Brass [Hardest], Yellow Brass, Red Brass, Bronze and then Copper. In that order. Hardest to softest.

 

y'see how easily I can be swayed to back off my position with a convincing argument !!

Not one of my best qualities...........................................

 

Where did u get that information? “The Internet” I suppose?

In any case, bronze is used where a nonferrous metal is needed, usually for corrosion resistance, and where high tensile strength is also needed. Most bronze types have higher strength than all brass types. But common names can be confusing, if you want to get technical use the particular alloy’s constituents and percentages of each. For example, gunmetal bronze was normally 90% copper and 10% tin. That alloy was both hard and strong, so was used for cannon barrels for centuries.

 

I've got one. Looks just like it. Same size. Mines missing a pin. The guy I got it from says it's from a ship called the fuji... I've been looking for 3 days now. Supposedly built in 1952 and sold in 1958 then disassembled.